Polarizing plate and organic EL panel
US9164213B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 18, 2013 |
| Grant date | Oct 20, 2015 |
| Priority date | — |
| Expiry date | Jun 18, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K59/8793
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Provided is a polarizing plate that has an excellent viewing angle characteristic and suppresses changes in display characteristics. A polarizing plate of the present invention is used in an organic EL panel, and includes a polarizer (10), a first retardation layer (30), and a second retardation layer (40). The first retardation layer (30) shows a refractive index characteristic of nx>ny≧nz, satisfies a relationship of Re(450)<Re(550), and has a water absorption rate of 3% or less. The second retardation layer (40) shows a refractive index characteristic of nz>nx≧ny. A laminate of the first retardation layer (30) and the second retardation layer (40) has an Re(550) of from 120 nm to 160 nm and an Rth(550) of from 40 nm to 100 nm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.